Can TypeScript support passing named rest arguments within the type declaration?

Using Tuple types in TypeScript enables us to create typesafe rest arguments:

type Params = [string,number,string]

const fn = (...args: Params) => null

// Type is (args_0: string, args_1: number, args_2: string) => null

Is there a method to assign specific names to these parameters within the Type realm?

Instead of default names like args_0, args_1, args_2, I am seeking a way to explicitly name them (e.g. myString, myNumber, mySecondString).

Answer №1

When utilizing tuples in TypeScript, assigning names to the tuple members allows for easier spread into function arguments:

type Parameters = [myString: string, myNumber: number, mySecondString: string]

const customFunction = (...args: Parameters) => null
// const customFunction: (myString: string, myNumber: number, mySecondString: string) => null

Try it out on the playground!

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